Ones that used to annoy me were in the standard library, in particular the unitest module with camel-case functions (assertEqual and so on), I've seen this just

Ones that used to annoy me were in the standard library, in particular the unitest module with camel-case functions (assertEqual and so on), I've seen this justified by it being old and predating the snake-case conventions, but surely assert_equal could have lived alongside the older names. Moot now that I've switched to pytest of course ...